public function existLogin(string $login): int
    {
        return (int) $this->connection->select(self::COLUMN_ID)
            ->from($this->tableIdentity)
            ->where(['login' => $login])
            ->fetchSingle();
    }
public function existLogin(string $login): int
    {
        return (int) $this->connection->select(self::COLUMN_ID)
            ->from($this->tableIdentity)
            ->where(['login' => $login])
            ->fetchSingle();
    }
public function existLogin ( string $ login ) : int { return ( int ) $ this -> connection -> select ( self :: COLUMN_ID ) -> from ( $ this -> tableIdentity ) -> where ( [ 'login' => $ login ] ) -> fetchSingle ( ) ; }
Exist login.

@param string $login
@return int
Exist login .