Delete Useless registration_id about pyfcm HOT 4 CLOSED

So, the thing is you need to map registration ids in your database with the respective users and just replace reg_ids when they change

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there is another issue here I don't replace users registration id with the old one because users can sign in via different devices so 1 user can have n reg_ids from different devices.

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Hey, I was looking at the InstanceID documentation and first example API that is info can be used to identify obsolete registration ids. I can think of a function like this for BaseAPI class

def clean_registration_ids(self, registration_ids):
    '''Return list of active IDS from the list of registration_ids

    '''
    headers = {'Authorization':'Key:'+WEB_API_KEY,
               'Content-Type': 'application/json; charset=UTF-8'}
    valid_registration_ids = []
    for registration_id in registration_ids:
        details = requests.get('https://iid.googleapis.com/iid/info/'+registraction_id, headers=headers, params={'details':'true'})
        if details.status_code == 200:
            valid_reg_ids.append(registration_id)
    return valid_registration_ids

Let me know what you think about this, I would be more than happy to submit a PR for the same.

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@baali Thanks a lot for the contribution, I'll merge it and update pypi very soon

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