message: Fix delete_user_token
diff: @@ -121,7 +121,7 @@ export class DiscordStore {
  public delete_user_token(discordId: string): Promise<null> {
  log.silly("SQL", "delete_user_token => %s", discordId);
  - return this.db.execAsync(
  + return this.db.runAsync(
  `
  DELETE FROM user_id_discord_id WHERE discord_id = $id;
  DELETE FROM discord_id_token WHERE discord_id = $id;
  