Random512, 

if your data is in the extractData property of your results the line 
.then(this.extractData) is NOT optional.

also, this line will replace the result with a null value:
.then(console.log(this.users))

if you use the result of getUsers()  promise somewhere else in your 
program. The console.log returns null, with the then function will use 
after that.

Regards
Sander

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