Bad ownership or modes for

Apr 26 11:45:37 ip-10-10-10-10.eu-west-1.compute.internal sshd[18174]: Authentication refused: bad ownership or modes for file /home/your_user/.ssh/authorized_keys

• authorized_keys
• sshd, sshd logs, sshd -t, sshd -T, sshd_config, sftp