iPhone 6s will not login to my apple ID

See these reads. I cannot guarantee a solution though.

Verification failed https://discussions.apple.com/thread/8321958

Apple ID Verification Failed: Unknown Error Occurred https://discussions.apple.com/thread/8343214

Verification failed : There was an error connecting to apple id server https://discussions.apple.com/thread/7238348

Error Connecting Apple ID, Verification Failed. How-To Fix https://appletoolbox.com/error-connecting-apple-id-verification-failed-how-to-fix/

How To Fix Verification Failed Error Prompt After Update To iOS 13 https://www.ikream.com/how-to-fix-verification-failed-error-prompt-after-update-to-ios-13-36692

If you want to contact Apple Support for help 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 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.

Some other things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone, iPad, or iPod touch         

Try a forced restart.

Reset Device.      

If necessary

Hard reset.        

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Backup - Restore your device from an iCloud or iTunes backup.