This PR sets up the initial stages to allow members to unsubscribe from competitions messaging. Adds a new flag to allow for filtering competitions by those who are subscribed to them to get emails.
How should this be manually tested?
Assign unsubscribed true values to any user in local gladiator, and dd() $competition->subscribers when testing a message.
What's this PR do?
This PR sets up the initial stages to allow members to unsubscribe from competitions messaging. Adds a new flag to allow for filtering competitions by those who are subscribed to them to get emails.
How should this be manually tested?
Assign unsubscribed true values to any user in local gladiator, and dd() $competition->subscribers when testing a message.
What are the relevant tickets?
Initial steps to fix #358