Invite members and assign roles
Invites live at Settings → Members → Invitations. The built-in roles are admin, member, and guest. There is no Owner / Developer / Viewer picker. The tenant owner is the account that created the org, not a fourth invite role.
Invitations expire after 7 days. Accept the email link (dashboard.stackblaze.cloud), not an app.stackblaze.cloud URL.
Step by step
Open Invitations
You need permission to manage users (admin, or an equivalent custom role). Go to Settings → Members → Invitations → Invite member.
Choose admin, member, or guest
admin is full access inside the tenant. member can work on projects. guest is read-mostly. Tenants can also have custom roles; the picker lists whatever GET /api/roles returns for the tenant.
Send the invite
The person gets an email with the role name and expiry. They join the tenant after they accept. You can revoke a pending invite from the same table.
What this is not
These are tenant roles, not cluster logins. Nobody on your team edits cluster objects. Platform admin is a StackBlaze operator role, not something you assign to a customer teammate.
Next steps