post new user

payload

{
	"username": "dave",
	"password": "123456",
	"recovery_email": "dave@tt.tt",
	"settings": {
		"default_locale": "fr",
		"message_display_format": "rich_text",
		"contact_display_format": "given_name, family_name",
		"contact_display_order": "given_name",
		"notification_enabled": true,
		"notification_message_preview": "always",
		"notification_sound_enabled": false,
		"notification_delay_disappear": 10,
		"notification_delay_disappear_unit": "s"
	},
	"device": {
		"device_id": "0e055232-110d-4f73-b67a-ca2609c71075",
		"ecdsa_key": {
			"curve": "P-256",
			"hash": "SHA256",
			"x": "0x28f7e2",
			"y": "0x30db8b"
		}
	}
}