What could be the reason I can't sign in to iCloud?

[iMore Question]

I cannot sign in to my icloud acct. which I use for Pinterest ; therefore I cannot sign in to Pinterest . What can the problem be. Help!!

 

[Just_Me_D]

An incorrect Apple ID or passcode, maybe?

 

[Ledsteplin]

I cannot sign in to my icloud acct. which I use for Pinterest ; therefore I cannot sign in to Pinterest . What can the problem be. Help!!

Sent from from my ancient but trustworthy iPhone 5

 

[Paula Cadiente]

This is a dead link

 

[Ledsteplin]

Well, shoot! Maybe this one will do:
https://support.apple.com/icloud