I am new to Databricks, I am using the free edition of Databricks. I have tried 
[spark.conf.set("fs.azure.account.auth.type.<storage-account>.dfs.core.windows.net", "SAS")
spark.conf.set("fs.azure.sas.token.provider.type.<storage-account>.dfs.core.windows.net", "org.apache.hadoop.fs.azurebfs.sas.FixedSASTokenProvider")
spark.conf.set("fs.azure.sas.fixed.token.<storage-account>.dfs.core.windows.net", dbutils.secrets.get(scope="<scope>", key="<sas-token-key>"))]  and [spark.conf.set(
"fs.azure.account.key.<storage-account>.dfs.core.windows.net",
dbutils.secrets.get(scope="<scope>", key="<storage-account-access-key>"))] but I keep getting the same error

[CONFIG_NOT_AVAILABLE] Configuration fs.azure.account.key.ygustorage.dfs.core.windows.net is not available. SQLSTATE: 42K0I