We are trying to generate token for custom rest api endpoint. We are using Azure Synapse Notebook in PySpark.

from azure.identity import DefaultAzureCredential,ManagedIdentityCredential
import requests

credential = ManagedIdentityCredential(client_id='xxxxxx-xxxx-xxxx-xxxx-xxxxx')

This code execute successfully without error. I know alternatively we can use ClientSecret authentication but because of complaince reason we have to use ManagedIdentityCredential only.

But using credential object if we try to get_token it throws error

token = credential.get_token("api://xxxxxx-xxxx-xxxx-xxxx-xxxxx/.default")

ManagedIdentityCredential.get_token failed: ManagedIdentityCredential
authentication unavailable, no managed identity endpoint found.
————————————————————————— CredentialUnavailableError Traceback (most recent call
last) Cell In [9], line 1
—-> 1 token = credential.get_token(“api://xxxxxx-xxxx-xxxx-xxxx-xxxxx/.default”)

File
~/cluster-env/clonedenv/lib/python3.10/site-packages/azure/identity/_internal/decorators.py:27,
in log_get_token..decorator..wrapper(*args, **kwargs)
24 @functools.wraps(fn)
25 def wrapper(*args, **kwargs):
26 try:
—> 27 token = fn(*args, **kwargs)
28 _LOGGER.info(“%s succeeded”, qualified_name)
29 return token

File
~/cluster-env/clonedenv/lib/python3.10/site-packages/azure/identity/_credentials/managed_identity.py:93, in ManagedIdentityCredential.get_token(self, *scopes, **kwargs)
91 if not self._credential:
92 raise CredentialUnavailableError(message=”No managed identity endpoint found.”)
—> 93 return self._credential.get_token(*scopes, **kwargs)

File
~/cluster-env/clonedenv/lib/python3.10/site-packages/azure/identity/_credentials/managed_identity.py:190,
in ImdsCredential.get_token(self, *scopes, **kwargs)
188 if not self._endpoint_available:
189 message = “ManagedIdentityCredential authentication unavailable, no managed identity endpoint found.”
–> 190 raise CredentialUnavailableError(message=message)
192 if len(scopes) != 1:
193 raise ValueError(“This credential requires exactly one scope per token request.”)

CredentialUnavailableError: ManagedIdentityCredential authentication
unavailable, no managed identity endpoint found.