how to get an access token and use the token to access key vault to load secret from Azure CLI (Bash)?

first i create an azure key vault with the following az command

az keyvault create --resource-group myResource-rg --name mykeyvault 

second i can store the secret(for example password) in the key vault

az keyvault secrete create --name dbpassword --vault-name mykeyvault --description "database password" --value "mysecretpassord"


third step is generate the access token to access the key vault

access_token=(curl 'http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=https%3A%2F%2Fvault.azure.net' -H Metadata: true -r '.access_toekn')

final step is to use the token to load the password out of key vault
(dbpassword is name of the password set in the key vault secret, mykeyvault is the name of the key vault that i had setup in Azure)

 db_password=$(curl https://mykeyvault.vault.azure.net/secrets/dbpassword?api-version=2016-10-01 -H "Authorization: Bearer $access_token" --silent | jq -r '.value')