@microsoft/kiota-authentication-spfx NPM

The Kiota Authentication SharePoint Framework Library is an implementation to authenticate HTTP requests in SharePoint Framework solutions. This Authentication library, re uses some infrastructure from the SPFx context to obtain a valid token for the required API.

It also works for consuming Microsoft Graph, as it is just another Azure Active Directory protected API.

A Kiota generated project will need a reference to an authentication provider to make calls to an API endpoint.

Using the Kiota Authentication SPFx

npm i @microsoft/kiota-authentication-spfx -S.

Then, you use the aadTokenProviderFactory provided by the SPFx context, to get an AadTokenProvider and use it to build the Kiota SPFx AuthProvider.

this.props.aadTokenProviderFactory.getTokenProvider()
      .then((tokenProvider: AadTokenProvider): void => {

        const authProvider =
          new AzureAdSpfxAuthenticationProvider(
            tokenProvider, 
            "{AZURE_AD_APPLICATION_ID_URI}",
            new Set<string>([
              "mycustomapi.azurewebsites.net",              
            ]));
        
        const adapter = new FetchRequestAdapter(authProvider);
        
        const myCustomApiClient = new MyCustomApiKiotaClient(adapter);

        myCustomApiClient.teams.get().then(teams => {
            // deal with returned data
        })
        .catch(e => {console.log(e)});
      })
      .catch(e => {console.log(e)});

If you have generated a Kiota client for Microsoft Graph, you can also use this Auth provider in a similar way:

    this.props.aadTokenProviderFactory.getTokenProvider()
      .then((tokenProvider: AadTokenProvider): void => {

        const authProvider =
          new AzureAdSpfxAuthenticationProvider(
            tokenProvider);
        
        const adapter = new FetchRequestAdapter(authProvider);
        
        const meClient = new GraphMeServiceClient(adapter);

        meClient.me.get().then(teams => {
          // deal with returned data
        })
        .catch(e => {console.log(e)});
      })
      .catch(e => {console.log(e)});