endpoint ftp:Client server1 {
protocol: ftp:FTP,
host:<ip_address>,
port:21,
secureSocket: {
    basicAuth: {
        username: <user_name>,
        password: <password>
    }
}
};

function functionName(ftp:Client server1){
    functionFromOtherBalFile(server1);
}

invalid action invocation, expected an endpoint