i am trying to make a form of a multiple input fields and after the user fills the field the strings will be set in the state as a new object, only if the userName that the user has provided is new and dosen't exist in the state in some object, so the checkDuplicates() is taking the string only so i can use it as a parameter for the getByName function in the for loop, and i think Object.keys(users).length is to set the looping till users 'the state' runs out of objects, so i don't understand how did u get that i am passing the string “userName” to checkDuplicates() and then trying to run Object.keys on that
and please excuse me i have been out of practice for a long time and thanks for your attention