Hello there!!
im testing user creation and every time it gives me a diferent id number, because of that i always have to change the value of my variable for future tests, so what i want to know is how to store whatever id number gives me into a variable.
every help is appreciated
This is covered in the Learning Centre.
Postman Galaxy Training | Postman API Network
Run through the “APIs 101 Training”, then the “Testing and Automation Training” course.
In addition to the helpful training course already cited, the reference documentation for using variables in Postman should steer you right to what you need.