webResponse.body dot anotation gives an empty result

[ginxx009]

I have this response from {{webResponse.body}}

{
"access_token": "fQUJam9HnQZiBC7Wznu3WLODoIj82M3uyJTlpLlXX4g4955tFPc1W8K2XRbJeulKw5L4SV7r67FMwO3zzFqUXQ",
"refresh_token": "KWh6u2aDvRpk1XdGPOvdWF535KHKtQeggh8PY9HS-c5vD0f7irq89SBOpekaaz6qkB9qjiZwll15khMvh3YLiw",
"scope": "useraccount",
"token_type": "Bearer",
"expires_in": 1799
}

and I want to get the access_token and send it via email so I am doing it like this on my send email automation

ACCESS TOKEN: {{webResponse.body.access_token}}

but when I open my email it gave me an empty string

ACCESS TOKEN: 

tried using

{{webHookResponse.body.access_token}}

{{webResponse.body.access_token}}

{{webResponse.body.first.access_token}}

none of them work.