kafka rest API request failed: Unauthorized (0)

I followed all the steps provided for the example "production-secure-deploy" but restproxy is not starting up and i am getting Unauthorized error

4m15s Warning FailedToDiscover kafkarestclass/default waiting for at-least one kafka pod availability
5s Warning FailedToDiscover kafkarestclass/default kafka cluster [kafka] in not in running state
2m43s Warning Warning kafkarestclass/default https://kafka.confluent.svc.cluster.local:8090/kafka/v3 dial tcp 10.64.1.53:8090: connect: connection refused
100s Warning Warning kafkarestclass/default https://kafka.confluent.svc.cluster.local:8090/kafka/v3 dial tcp 10.64.2.60:8090: connect: connection refused
110s Warning Warning kafkarestclass/default https://kafka.confluent.svc.cluster.local:8090/kafka/v3 dial tcp 10.64.0.59:8090: connect: connection refused
15s Warning Warning kafkarestclass/default kafka rest API request failed: Unauthorized (0)

I did create the rest-credential from the file bearer.txt as defined in the document

kubectl create secret generic rest-credential --from-file=bearer.txt=$TUTORIAL_HOME/bearer.txt --from-file=basic.txt=$TUTORIAL_HOME/bearer.txt --namespace confluent


What could be the reason for this Unauthorized error

Start by reproducing the production-secure-deploy example and reviewing the Kafka REST API discovery warnings, especially the connection-refused and Unauthorized messages. Check the rest-credential secret creation using bearer.txt and compare it with the REST proxy configuration; done means the REST proxy starts and Kafka REST API discovery succeeds.

Written by the indexing model from the issue text.