How to get data from Cisco Switches?

amitchandak  Thank you for your response.

I have seen any available API even I have tried to get through de API Documents from Cisco Cisco API Documentation - Cisco DevNet

Are there any other solutions like directly connecting to database? 

What I need to do is extracted the data "Resorce Utilization" & "System Health" from Cisco Switch 

Hi amitchandak 

I have found that I can access data I need through Cisco Rest API. I have set up and tested the API. The API work well when I try query with Curl. The syntax as follows:

curl -X GET https://30.10.543.65/api/v2/nodes -H "Accept: application/json" -H "Authorization: Bearer eyJwMyYiJ9.eyJpclciI6I30.lkAwbsfmNzA"

Now I try to create a Power Query Connector using Json Web Token (JWT) for authentication. The Curl snippet for query data is:
curl -k -H "Authorization: Bearer SIGNED_JWT" "https://30.10.543.65/api/v2/nodes/?fields=/system-state/basic&page=0&size=20&sort=ip,asc&type=Device&hostname=switch8"

However, I don't know how to work with JWT Authentication in Power Query. would you help me with this please? My power query connector starts as follows:

// This file contains your Data Connector logic
section CiscoSwitch;

[DataSource.Kind="CiscoSwitch", Publish="CiscoSwitch.Publish"]
shared CiscoSwitch.Contents = Web.Contents("https://30.10.543.65", [ApiKeyName="api_key"])

// Data Source Kind description
CiscoSwitch = [
Authentication = [
// Key = [],
// UsernamePassword = [],
// Windows = [],
Implicit = []
],
Label = Extension.LoadString("DataSourceLabel")
];