refactor: to enable oauth during registration, use the appropriate controller.

Endpoint/Controllers/V1/AuthController.cs

@@ -172,7 +172,6 @@ public class AuthController(IOptionsSnapshot<Admin> user, IOptionsSnapshot<Gener
     /// <param name="action">The action to be performed: Login or Bind.</param>
     /// <returns>If <see cref="OAuthAction.Bind"/> return Ok. If <see cref="OAuthAction.Login"/> return <see cref="TwoFactorAuthentication"/></returns>
     [HttpGet("HandleToken")]
-    [MaintenanceModeIgnore]
     [BadRequestResponse]
     public async Task<ActionResult> HandleToken([FromQuery][MinLength(2)] string token, [FromQuery] OAuthAction action)
     {