rename API_TOKEN_KEY to CM_API_TOKEN to keep the naming convention and update all its dependents;
rename API_ADDRESS to CM_API_ADDRESS to keep the naming convention and update all its dependents;
add the key used to store API user id on SharedPreferences as a public final static string resource, "CM_API_USER_ID";
implement email_profile and nickname_profile on AuthFragment;
implement CM_API_USER_ID on Authentication;