can't enter to my apple ID

I have not seen a definitive solution for your problem. So, Isuggest you use my search link in trying to solve your problem:  verification failed unknown error apple. You will see a number of links that are, or may be, related to your specific problem. 

If you want to contact Apple Support to deal with your problem, see:

Get a call from Apple support to help solve your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

Apple ID Support https://support.apple.com/apple-id

Apple Support Twitter https://twitter.com/AppleSupport

Apple ID account security for country-specific and region-specific help https://support.apple.com/en-us/HT204169

Get Support: We’re here to help https://getsupport.apple.com/. Go through the options to find the best one.

MHMDSAUD Said:

"before this issue, I revived a message to allow someone from another country to use my apple ID so I didn't allow. after that this issue comes. should I be worried?"

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Yes. This is concerning, being that you Apple ID is known.

So Notes and What to Perform:

I. Unexpected Messages:

Apple would not send you a message about calling someone to access your Apple Mac.  This Someone you speak of is seeking your credentials.  So, having interacted with with on it, most certainly consider modifying your credentials, Immediately.

II. Performing the following is best at this point.

• Modifying: your login credentials (using both a New eMail and a New Password) for Apple and each and all sites
• Associating: a different method of payment to your account
• Enabling: Two-Factor Authentication for Apple ID and for all other accounts that have such an applicable option

Next...

III. Create a New User on your Mac:

If someone can get into your Mac, through this user, then create a new administrator. Once created, transfer everything over to this new user from your current user. Then, erase that user.

A. Time Machine Backup:

Important: Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the user creation.

B. To Create a New User:

1. Go to: System Preferences
2. Click: Users & Groups
3. Unlock: the Lock
4. Click: "+" button
5. Select: "Administrator" for the type of user
6. Proceed form there as necessary

C. To Delete the Current User:

1. Go to: System Preferences
2. Click: Users & Groups
3. Unlock: the Lock
4. Click: "-" button
5. proceed from there as necessary

D. Time Machine Backup:

Important: Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong after the new user creation.

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