Docker push denied requested access to the resource is denied unauthorized authentication required

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Open command prompt and execute below command

docker login

If you have Docker Desktop installed then it will automatically get credentials otherwise you can follow steps: click here 

Ensure you have tagged the local images with the Docker account namespace -

To get Docker account namespace: click here


You can change the tag using below command
docker tag name-of-image docker_a/c_namespace/name-of-image

Example- C:\Windows\System32>docker tag eazybytes/loans ctcsinformation/loans

Finally you can push the docker images to docker hub


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