def delete_signing_certificate(UserName=None, CertificateId=None):
    """
    Deletes a signing certificate associated with the specified IAM user.
    If you do not specify a user name, IAM determines the user name implicitly based on the AWS access key ID signing the request. Because this action works for access keys under the AWS account, you can use this action to manage root credentials even if the AWS account has no associated IAM users.
    See also: AWS API Documentation
    
    Examples
    The following command deletes the specified signing certificate for the IAM user named Anika.
    Expected Output:
    
    :example: response = client.delete_signing_certificate(
        UserName='string',
        CertificateId='string'
    )
    
    
    :type UserName: string
    :param UserName: The name of the user the signing certificate belongs to.
            This parameter allows (per its regex pattern ) a string of characters consisting of upper and lowercase alphanumeric characters with no spaces. You can also include any of the following characters: =,.@-
            

    :type CertificateId: string
    :param CertificateId: [REQUIRED]
            The ID of the signing certificate to delete.
            The format of this parameter, as described by its regex pattern, is a string of characters that can be upper- or lower-cased letters or digits.
            

    :return: response = client.delete_signing_certificate(
        CertificateId='TA7SMP42TDN5Z26OBPJE7EXAMPLE',
        UserName='Anika',
    )
    
    print(response)
    
    
    """
    pass
