{
"token": "{{firebase_access_token}}",
"returnSecureToken": true
}curl --location -g --request POST 'https://identitytoolkit.googleapis.com/v1/accounts:signInWithCustomToken?key={{firebase-api-key}}' \
--header 'Content-Type: application/json' \
--data-raw '{
"token": "",
"returnSecureToken": true
}'{
"errCode": "string",
"errMsg": "string",
"success": true,
"timestamp": "string"
}