message: fix(server): checks if invite is valid and returns proper error when not, partly fixes
diff: @@ -100,7 +100,7 @@ This email was sent from ${serverInfo.name} at ${process.env.CANONICAL_URL}, dep
  async validateInvite( { email, id } ) {
  const invite = await module.exports.getInviteById( { id } )
  - return invite.email === email
  + return invite && invite.email === email
  },
  async useInvite( { id, email } ) {
  