While building the codebuild , i get an error

I get error : Container] 2024/10/11 07:43:01.007231 Running command docker push "$DOCKER_REGISTRY_URL/$DOCKER_REGISTRY_USERNAME/simple-python-flask-app:latest" The push refers to repository [//simple-python-flask-app] 6512f535df6e: Preparing a2bcea7dc112: Preparing aeaf75cdf000: Preparing a8aab14c614c: Preparing 32ee710ca3c7: Preparing 1767e4d52b5a: Preparing 45b98afd69b3: Preparing 2bce433c3a29: Preparing f91dc7a486d9: Preparing 3e14a6961052: Preparing d50132f2fe78: Preparing 1767e4d52b5a: Waiting 45b98afd69b3: Waiting 2bce433c3a29: Waiting f91dc7a486d9: Waiting 3e14a6961052: Waiting d50132f2fe78: Waiting denied: requested access to the resource is denied

[Container] 2024/10/11 07:43:01.063175 Command did not exit successfully docker push "$DOCKER_REGISTRY_URL/$DOCKER_REGISTRY_USERNAME/simple-python-flask-app:latest" exit status 1 [Container] 2024/10/11 07:43:01.067378 Phase complete: BUILD State: FAILED [Container] 2024/10/11 07:43:01.067397 Phase context status code: COMMAND_EXECUTION_ERROR Message: Error while executing command: docker push "$DOCKER_REGISTRY_URL/$DOCKER_REGISTRY_USERNAME/simple-python-flask-app:latest". Reason: exit status 1 [Container] 2024/10/11 07:43:01.101145 Entering phase POST_BUILD [Container] 2024/10/11 07:43:01.102049 Running command echo "Build completed successfully!"