Firebase deploy works in the console but not in bitbucket pipeline

[Malcolm Rudhag]

I'm trying to deploy my webapp to firebase hosting through a bitbucket pipeline, It's not deploying correctly in the pipeline but in the console it works no problem. This is what I do in the console:

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npm install
npm run build

firebase login:ci
firebase deploy --project $PROJECT_NAME
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In the pipeline I'm running this YAML script:

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image: node:10.15.3

pipelines:
   default:
     - step:
          name: Install and Build App
          caches:
              - node
          script:
              - npm install
              - npm run build
          artifacts:
              - build/**
     - step:
          name: Deploy App to Firebase
          deployment: production
          script:
            - pipe: atlassian/firebase-deploy:0.6.0
               variables:
                    KEY_FILE: $KEY_FILE
                    PROJECT_ID: $PROJECT_ID

Maybe someone can shed some light on why this isn't working, I'm new to pipeline scripts and I don't really see the issue, it succeeds in deploying to firebase hosting but It's not working at all on the actual domain.