Accepting an invite will immediately add you to an organization. You can not accept an invite if you are already in an organization.

curl --location --request POST 'https://sux.chatsight.ai/api/users/self/inviteAccept' \
--header 'Authorization: Bearer <API_KEY>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "ticket": <INVITE_TICKET>
}'

What is <INVITE_TICKET> ?

INVITE_TICKET is the name of the property key in your notifications that corresponds to the invite request.