isSendMessage is true, then overrideClientId is required. You may check if the credentials (phone number/email) already exits in ConnectID by using Check credential - client mode API.credential.isSendMessage is set as true. The message is composed using a template that must be configured by Unite support. A part of this message is a link that the user must click in order to login (for existing users) or set password (for new users). This means that you also must supply the returnUrl and errorUrl. These urls are used by our systems to generate the link in the message.curl --location --request POST 'https://api.mediaconnect.no/capi/v1/client/order//user' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
"credential": "+4712345678",
"isSendMessage": true,
"returnUrl": "www.mediaconect.no/...",
"errorUrl": "www.mediaconect.no/...",
"linkLifetime": 2,
"overrideClientId": "no.mediaconnect"
}'{
"orderId": 14,
"uniqueUserId": "f21942404003447993b198bdd7ba2ef4",
"isNewUser": true,
"isPasswordSet": false
}