How to use multiple returned value from a python function in a robot file?

I have written a python function for fetching database credentials for different environments

def database_creds(env):
    if env == 'staging' or env == 'qa':
        hostname = 'host1'
        username = 'user1'
        password = 'pass11'
        database = 'TestDb'
    elif env == 'production':
        hostname = 'host2'
        username = 'user2'
        password = 'pass22'
        database = 'ProdDb'
    return hostname, username, password, database

My doubt is how we can use each returned values in robot file?

If we are returning only one value from a python function

def getApiFullUrl(env):
    if env== 'production':
        url = 'production url'
    else:
        url = 'other environment url'
    return url

we can use like this in robot file:

${url}  ${getApiFullUrl('${env}')}