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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def get_user(username, **kwargs):
    '''
    Get username line from switch.

    .. code-block: bash

        salt '*' nxos.cmd get_user username=admin
    '''
    command = 'show run | include "^username {0} password 5 "'.format(username)
    info = ''
    info = show(command, **kwargs)
    if isinstance(info, list):
        info = info[0]
    return info