denied: requested access to the resource is denied

Não consigo subir minha imagem no docker dentro do gitlab. Fiz exatamente igual como foi dito na aula, mas ainda não entendi o erro.

image: docker:stable

services:
- docker:dind

before_script:
- docker info
- docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY   

build-docker:
    stage: build
    script:
    - docker build -t csmascaras .
    - docker tag csmascaras rsperlongo/csmascaras:latest
    - docker push rsperlongo/csmascaras:latest

Ele falha no push

// resposta no pipeline
$ docker push rsperlongo/csmascaras
The push refers to repository [docker.io/rsperlongo/csmascaras]
28a31ad193fa: Preparing
94e73cafb9fb: Preparing
4f8c4d803744: Preparing
586b56821cd0: Preparing
dbb11aa387dc: Preparing
05708835b45e: Preparing
aaaede926ce1: Preparing
6bb414a5ce23: Preparing
f2c194ac8a61: Preparing
2a50ea4f9e8e: Preparing
634249d50b9e: Preparing
68e35493907b: Preparing
e84b9d651af1: Preparing
05708835b45e: Waiting
aaaede926ce1: Waiting
6bb414a5ce23: Waiting
f2c194ac8a61: Waiting
2a50ea4f9e8e: Waiting
634249d50b9e: Waiting
68e35493907b: Waiting
e84b9d651af1: Waiting
denied: requested access to the resource is denied
ERROR: Job failed: exit code 1