Fix claims.

Use OID instead of email for microsoft identifier.
Fix PlayerCount route.
Add created date to user table.
Create spectator icon.

Shogi.Api/Controllers/SessionsController.cs

@@ -74,13 +74,7 @@ public class SessionsController : ControllerBase
   [HttpGet("PlayerCount")]
   public async Task<ActionResult<ReadSessionsPlayerCountResponse>> GetSessionsPlayerCount()
   {
-    var sessions = await this.queryRespository.ReadSessionPlayerCount();
-
-    return Ok(new ReadSessionsPlayerCountResponse
-    {
-      PlayerHasJoinedSessions = Array.Empty<SessionMetadata>(),
-      AllOtherSessions = sessions.ToList()
-    });
+    return Ok(await this.queryRespository.ReadSessionPlayerCount(this.User.GetShogiUserId()));
   }
 
   [HttpGet("{name}")]