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It resolves the session, calls ",[444,614,449],{},", captures timing into ",[444,617,618],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[621,622,269],"h2",{"id":623},"options",[441,625,626,627,634],{},"Inherits all ",[628,629,631,633],"a",{"href":630},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[444,632,449],{}," options",", plus:",[636,637,638,657],"table",{},[639,640,641],"thead",{},[642,643,644,648,651,654],"tr",{},[645,646,647],"th",{},"Option",[645,649,650],{},"Type",[645,652,653],{},"Default",[645,655,656],{},"Description",[658,659,660,681,700,719],"tbody",{},[642,661,662,668,673,678],{},[663,664,665],"td",{},[444,666,667],{},"exclude",[663,669,670],{},[444,671,672],{},"string[]",[663,674,675],{},[444,676,677],{},"['\u002Fapi\u002Fauth\u002F**']",[663,679,680],{},"Route patterns to skip (glob).",[642,682,683,688,692,697],{},[663,684,685],{},[444,686,687],{},"include",[663,689,690],{},[444,691,672],{},[663,693,694],{},[444,695,696],{},"undefined",[663,698,699],{},"If set, only matching routes are resolved.",[642,701,702,707,712,716],{},[663,703,704],{},[444,705,706],{},"onIdentify",[663,708,709],{},[444,710,711],{},"(log, session) => void",[663,713,714],{},[444,715,696],{},[663,717,718],{},"Called after successful identification.",[642,720,721,726,731,735],{},[663,722,723],{},[444,724,725],{},"onAnonymous",[663,727,728],{},[444,729,730],{},"(log) => void",[663,732,733],{},[444,734,696],{},[663,736,737],{},"Called when no session is found.",[621,739,741],{"id":740},"route-filtering","Route Filtering",[441,743,744],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[452,746,748],{"className":454,"code":747,"language":457,"meta":458,"style":458},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[444,749,750,766,775,790,803,817,824],{"__ignoreMap":458},[462,751,752,754,756,758,760,762,764],{"class":464,"line":465},[462,753,507],{"class":506},[462,755,510],{"class":476},[462,757,513],{"class":472},[462,759,477],{"class":516},[462,761,519],{"class":476},[462,763,522],{"class":472},[462,765,525],{"class":472},[462,767,768,770,772],{"class":464,"line":496},[462,769,532],{"class":531},[462,771,535],{"class":472},[462,773,774],{"class":476}," [\n",[462,776,777,780,782,784,786],{"class":464,"line":503},[462,778,779],{"class":472},"    '",[462,781,544],{"class":489},[462,783,541],{"class":472},[462,785,522],{"class":472},[462,787,789],{"class":788},"sHwdD","     \u002F\u002F Better Auth itself\n",[462,791,792,794,796,798,800],{"class":464,"line":528},[462,793,779],{"class":472},[462,795,553],{"class":489},[462,797,541],{"class":472},[462,799,522],{"class":472},[462,801,802],{"class":788},"   \u002F\u002F Public endpoints\n",[462,804,805,807,810,812,814],{"class":464,"line":564},[462,806,779],{"class":472},[462,808,809],{"class":489},"\u002Fapi\u002Fhealth",[462,811,541],{"class":472},[462,813,522],{"class":472},[462,815,816],{"class":788},"      \u002F\u002F Health checks\n",[462,818,819,822],{"class":464,"line":585},[462,820,821],{"class":476},"  ]",[462,823,561],{"class":472},[462,825,826,828],{"class":464,"line":599},[462,827,602],{"class":472},[462,829,605],{"class":476},[441,831,832],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[452,834,836],{"className":454,"code":835,"language":457,"meta":458,"style":458},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[444,837,838,854,882],{"__ignoreMap":458},[462,839,840,842,844,846,848,850,852],{"class":464,"line":465},[462,841,507],{"class":506},[462,843,510],{"class":476},[462,845,513],{"class":472},[462,847,477],{"class":516},[462,849,519],{"class":476},[462,851,522],{"class":472},[462,853,525],{"class":472},[462,855,856,858,860,862,864,867,869,871,873,876,878,880],{"class":464,"line":496},[462,857,567],{"class":531},[462,859,535],{"class":472},[462,861,538],{"class":476},[462,863,541],{"class":472},[462,865,866],{"class":489},"\u002Fapi\u002Fdashboard\u002F**",[462,868,541],{"class":472},[462,870,522],{"class":472},[462,872,486],{"class":472},[462,874,875],{"class":489},"\u002Fapi\u002Faccount\u002F**",[462,877,541],{"class":472},[462,879,558],{"class":476},[462,881,561],{"class":472},[462,883,884,886],{"class":464,"line":503},[462,885,602],{"class":472},[462,887,605],{"class":476},[441,889,890,892,893,895,896,899,900,903,904,906,907,909],{},[444,891,687],{}," and ",[444,894,667],{}," use glob patterns (",[444,897,898],{},"*",", ",[444,901,902],{},"**","). Provide both if you need granular control — ",[444,905,667],{}," wins over ",[444,908,687],{},".",[621,911,913],{"id":912},"lifecycle-hooks","Lifecycle Hooks",[441,915,916,917,919],{},"Use ",[444,918,706],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[452,921,923],{"className":454,"code":922,"filename":456,"language":457,"meta":458,"style":458},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[444,924,925,941,968,1004,1031,1036,1041,1058,1083,1088],{"__ignoreMap":458},[462,926,927,929,931,933,935,937,939],{"class":464,"line":465},[462,928,507],{"class":506},[462,930,510],{"class":476},[462,932,513],{"class":472},[462,934,477],{"class":516},[462,936,519],{"class":476},[462,938,522],{"class":472},[462,940,525],{"class":472},[462,942,943,946,948,951,955,957,960,963,966],{"class":464,"line":496},[462,944,945],{"class":516},"  onIdentify",[462,947,535],{"class":472},[462,949,950],{"class":472}," (",[462,952,954],{"class":953},"sHdIc","log",[462,956,522],{"class":472},[462,958,959],{"class":953}," session",[462,961,962],{"class":472},")",[462,964,965],{"class":506}," =>",[462,967,525],{"class":472},[462,969,970,973,975,978,980,983,985,988,991,993,996,998,1001],{"class":464,"line":503},[462,971,972],{"class":468},"    if",[462,974,950],{"class":531},[462,976,977],{"class":476},"session",[462,979,909],{"class":472},[462,981,982],{"class":476},"user",[462,984,909],{"class":472},[462,986,987],{"class":476},"plan",[462,989,990],{"class":472}," ===",[462,992,486],{"class":472},[462,994,995],{"class":489},"enterprise",[462,997,541],{"class":472},[462,999,1000],{"class":531},") ",[462,1002,1003],{"class":472},"{\n",[462,1005,1006,1009,1011,1014,1017,1020,1023,1025,1027,1029],{"class":464,"line":528},[462,1007,1008],{"class":476},"      log",[462,1010,909],{"class":472},[462,1012,1013],{"class":516},"set",[462,1015,1016],{"class":531},"(",[462,1018,1019],{"class":472},"{",[462,1021,1022],{"class":531}," _forceKeep",[462,1024,535],{"class":472},[462,1026,594],{"class":593},[462,1028,480],{"class":472},[462,1030,605],{"class":531},[462,1032,1033],{"class":464,"line":564},[462,1034,1035],{"class":472},"    }\n",[462,1037,1038],{"class":464,"line":585},[462,1039,1040],{"class":472},"  },\n",[462,1042,1043,1046,1048,1050,1052,1054,1056],{"class":464,"line":599},[462,1044,1045],{"class":516},"  onAnonymous",[462,1047,535],{"class":472},[462,1049,950],{"class":472},[462,1051,954],{"class":953},[462,1053,962],{"class":472},[462,1055,965],{"class":506},[462,1057,525],{"class":472},[462,1059,1061,1064,1066,1068,1070,1072,1075,1077,1079,1081],{"class":464,"line":1060},8,[462,1062,1063],{"class":476},"    log",[462,1065,909],{"class":472},[462,1067,1013],{"class":516},[462,1069,1016],{"class":531},[462,1071,1019],{"class":472},[462,1073,1074],{"class":531}," anonymous",[462,1076,535],{"class":472},[462,1078,594],{"class":593},[462,1080,480],{"class":472},[462,1082,605],{"class":531},[462,1084,1086],{"class":464,"line":1085},9,[462,1087,1040],{"class":472},[462,1089,1091,1093],{"class":464,"line":1090},10,[462,1092,602],{"class":472},[462,1094,605],{"class":476},[441,1096,1097,1098,1100,1101,1103,1104,1106],{},"Hooks fire after the session is resolved and ",[444,1099,449],{}," has set its fields. They run on every request that passes the ",[444,1102,687],{},"\u002F",[444,1105,667],{}," filter, so keep them fast and side-effect-free.",[1108,1109,1110,1115],"tip",{},[441,1111,1112,1113,535],{},"Common patterns for ",[444,1114,706],{},[1116,1117,1118,1122,1125],"ul",{},[1119,1120,1121],"li",{},"Force-keep audit logs for admins or high-value plans.",[1119,1123,1124],{},"Tag the request with feature flags or tenant info loaded from the session.",[1119,1126,1127],{},"Increment a per-user counter for billing.",[621,1129,1131],{"id":1130},"error-handling","Error Handling",[441,1133,1134,1135,1138,1139,892,1141,1144],{},"The middleware catches every error from ",[444,1136,1137],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[444,1140,618],{},[444,1142,1143],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1146,1147,1148],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":458,"searchDepth":496,"depth":496,"links":1150},[1151,1152,1153,1154],{"id":623,"depth":496,"text":269},{"id":740,"depth":496,"text":741},{"id":912,"depth":496,"text":913},{"id":1130,"depth":496,"text":1131},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1158,1161],{"label":293,"icon":296,"to":294,"color":1159,"variant":1160},"neutral","subtle",{"label":307,"icon":310,"to":308,"color":1159,"variant":1160},{},{"title":298,"icon":301},{"title":436,"description":1155},"Ft-jGRp0Xs3NjYmYAXhrK-z4jsNG1S1GJbOMZWpMh0E",[1167,1169],{"title":293,"path":294,"stem":295,"description":1168,"icon":296,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":303,"path":304,"stem":305,"description":1170,"icon":253,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1778444363415]