Retrieving an IdentityBlob token for a specific user

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The RLS has been set up on the Azure side but we are struggling to generate an IdentityBlob token for a user in the python code.

IdentityBlob: a blob for specifying the identity. Only supported for datasets with Direct Query connection to SQL Azure

So,

To use token-based identity, you first need to get an AAD access token, and then add it into the ‘identitiyBlob’ property when generating the embed token:

{
"accessLevel": "View",
"identities": [
{
"datasets": [ "fe0a1aeb-f6a4-4b27-a2d3-b5df3bb28bdc"],
         “identityBlob”: {
“value”: “eyJ0eXAiOiJKV1QiLCJh….”
}
}
]
}

How does one programmatically "get" the AAD access token to place in the value placeholder for "identityBlob"?

Can anyone recommend a way of retrieveing the IdentityBlob using JSON / Python? Or direct to a website with this information?

Many thanks.

We are following the information on this page