Invite a user
Invites a person to the account by email. Reactor emails them a link. They follow it,
sign up or sign in to the dashboard, and accept. Only an account_admin of the account
may invite.
The invitation is bound to the address you send. Only a signed-in user whose verified
email matches it can accept. Addresses with a + tag in the local part are rejected,
because the match is exact.
The invitee gets the roles in roles when they accept, developer by default.
Invitations expire after 7 days. Only one pending invitation may exist per address per
account.
Authorizations
A Reactor API key (rk_...), sent as Authorization: Bearer rk_.... Keep it on a server.
Path Parameters
The account's ID. Use the account_id from GET /me.