Authenticate user for Pusher session.

curl --request POST \
  --url https://api.gleap.io/v3/users \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "email": "<string>",
  "password": "<string>",
  "referral": "<string>",
  "utm_source": "<string>",
  "utm_medium": "<string>",
  "utm_term": "<string>",
  "utm_content": "<string>",
  "utm_campaign": "<string>",
  "onboardingFlow": "<string>"
}'

"<any>"