Authentication Token
So now back to the question : "Best Practice to Generate Authentication Token"
By far this is the best what I found :
Token-based-authentication-securing-the-token
Will update if any better article.

seen from Germany
seen from Russia

seen from Canada
seen from China
seen from United States
seen from Germany
seen from China

seen from Germany

seen from Canada
seen from China

seen from Ireland
seen from United States
seen from Canada
seen from United States
seen from Canada
seen from United States
seen from United Arab Emirates
seen from China
seen from United States
seen from United States
Authentication Token
So now back to the question : "Best Practice to Generate Authentication Token"
By far this is the best what I found :
Token-based-authentication-securing-the-token
Will update if any better article.
Saving and Retrieving data from NSUserDefaults
-(void) saveIt:(NSString*)myToken{ NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [defaults setObject:myToken forKey:@"myToken"]; [defaults synchronize]; NSLog(@"Token saved: %@", myToken ); } -(NSString*) retrieveIt{ NSLog(@"Checking token in NSUserDefaults.."); NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSString * myToken =[defaults objectForKey:@"myToken"]; NSLog(@"Token is: %@", myToken); return myToken; }