Add lead to Intercom from React Native APP?

Question

Is it possible to add a lead (not a user) to Intercom using the React Native SDK? Or do I need to use their API directly? I tried using the API, but it seems to be adding a user and not adding it to the rest of the contacts.

export const addIntercomLead = async (email: string) : Promise<void> => {
    const url = 'https://api.intercom.io/contacts'
    const token = 'token'
    const headers = {'Authorization': 'Bearer ' + token,
    'Accept': 'application/json'}
    const data = {
        "phone": "123987456",
        "email": email,
        "name": "Winston Smith"
    }

    const response = await fetch(url, {method: 'POST', headers: headers, body: JSON.stringify(data)})
    console.log(response.status)
}