help with interupting of pseudo code in paython

Hi!
Can you please help me to interupt this pseudo code to real python code!

def authenticate_user(credentials: str) -> bool:
    """Procedure for validating user credentials"""
    username = 'Chevy_Chase'  # Expected username. MAY NOT BE MODIFIED!!
    password = 'i0J0u0j0u0J0Zys0r0{'  # Expected password. MAY NOT BE MODIFIED!!
    user_tmp = pass_tmp = str()

    ''' PSEUDO CODE
    PARSE string value of 'credentials' into its components: username and password.
    SEND username for FORMATTING by utilizing devoted function. Store return value in 'user_tmp'.
    SEND password for decryption by utilizing devoted function. Store return value in 'pass_tmp'.
    VALIDATE that both values corresponds to expected credentials.
    RETURN outcome of validation as BOOLEAN VALUE.
    '''