migrate to identity for authentication

api/src/Services/JwtService.cs

@@ -22,13 +22,17 @@ public class JwtService {
 
         var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
 
+        if(user.UserName == null) return null;
+
         // not too sure
         var claims = new[] {
-            new Claim(ClaimTypes.Name, user.Name),
+            new Claim(ClaimTypes.Name, user.UserName),
             new Claim(ClaimTypes.NameIdentifier, user.Id.ToString())
         };
 
         var token = new JwtSecurityToken(
+            issuer: "agologum",
+            audience: "agologum",
             claims: claims,
             expires: DateTime.UtcNow.AddHours(2), // will add a refresher later
             signingCredentials: creds