无法在Docker中推送图像

I have made an image using the command docker build -t my-app-1.0-snapshot .. When I try to push it to Docker Hub from windows cmd, I get error

docker push manuchadha25/my-app-1.0-snapshot
The push refers to repository [docker.io/manuchadha25/codingjediweb-1.0-snapshot]
An image does not exist locally with the tag: manuchadha25/my-app-1.0-snapshot

When I tried just using the name of the image without my username, I get access denied error

The push refers to repository [docker.io/library/codingjediweb-1.0-snapshot]
5bd738db4dd5: Preparing                                                                                                 a57994b863ef: Preparing                                                                                                 85802b819ba0: Preparing                                                                                                 3cb3e7a9fe58: Preparing                                                                                                 04dc636f40fe: Preparing                                                                                                 691339400516: Waiting                                                                                                   2ee490fbc316: Waiting                                                                                                   b18043518924: Waiting                                                                                                   9a11244a7e74: Waiting                                                                                                   5f3a5adb8e97: Waiting                                                                                                   73bfa217d66f: Waiting                                                                                                   91ecdd7165d3: Waiting                                                                                                   e4b20fcc48f4: Waiting                                                                                                   denied: requested access to the resource is denied

Then I tried to tag the image using docker tag my-app-1.0-snapshot:latest coding_jedi_first_deployment:1.00 and then I tried to push it but again got access denied error. I have logged using docker login already.

The push refers to repository [docker.io/library/my_app_first_deployment]
5bd738db4dd5: Preparing                                                                                                 a57994b863ef: Preparing                                                                                                 85802b819ba0: Preparing                                                                                                 3cb3e7a9fe58: Preparing                                                                                                 04dc636f40fe: Preparing                                                                                                 691339400516: Waiting                                                                                                   2ee490fbc316: Waiting                                                                                                   b18043518924: Waiting                                                                                                   9a11244a7e74: Waiting                                                                                                   5f3a5adb8e97: Waiting                                                                                                   73bfa217d66f: Waiting                                                                                                   91ecdd7165d3: Waiting                                                                                                   e4b20fcc48f4: Waiting                                                                                                   denied: requested access to the resource is denied

我在做什么错>