GET /api/sessions/check

Checks whether an identifier is available for registration. Routes to the Vault Durable Object for the supplied identifier.

Query parameters

Parameter	Type	Required	Description
`identifier`	`string`	Yes	Identifier to check (also accepts `handle`)
`channel`	`string`	No	Channel (default: `"handle"`)

{ "available": true, "reason": null }

{ "available": false, "reason": "taken" }

{ "available": false, "reason": "reserved", "message": "This identifier is reserved" }