add logout for refreshTokens

api/src/Services/JwtService.cs

@@ -69,4 +69,12 @@ public class JwtService {
         return await db_.Users.FindAsync(id);
     }
 
+    public async Task<bool> RevokeRefreshToken(string refreshTokenString) {
+        var refreshToken = await db_.RefreshTokens.FirstOrDefaultAsync(u => u.Token == refreshTokenString);
+        if(refreshToken == null) return false;
+        refreshToken.IsRevoked = true;
+        await db_.SaveChangesAsync();
+        return true;
+    }
+
 }