How to solve public key error when running Ansible playbook

I’m using ubuntu 18 on GCP and I’m trying to run an ansible playbook. I’ve already successfully pinged my remote host but I get a connection error when trying to run the ansible playbook.

dinthebeatmaker@mastervmproj:~$ ansible-playbook project.yml --check            
PLAY [Hosts] *******************************************************************

TASK [Gathering Facts] *********************************************************
fatal: [10.128.0.13]: UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: [email protected]: Permission denied (publickey).", "unreachable": true}

PLAY RECAP *********************************************************************
10.128.0.13                : ok=0    changed=0    unreachable=1    failed=0    skipped=0    rescued=0    ignored=0

Here’s the playbook

---
- hosts: Hosts
  become: yes
  tasks:
  - name: install java
    package:
     name: openjdk-8-jdk
     state: present
  - name: copy chromedriver
    copy:
     src: /home/dinthebeatmaker
     dest: /home/dinthebeatmaker
     remote_src: yes
  - name: install chromium browser
    package:
     name: chromium-browser
     state: present