Anuglar 7 with .NET core 2.0

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C#

Angular7

Hi, I am trying to authenticate .net core web service via anuglar 7 application. I have tried passing

application/json

but for some reason the request isn't received by the service.

public async Task Invoke(HttpContext context)
        {  
            string authHeader = context.Request.Headers["Authorization"];
            if (!string.IsNullOrEmpty(authHeader))
            {
                var secretKey = Startup.AppSettings.Secret;
                var signingKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(secretKey));
                List<SymmetricSecurityKey> keys = new List<SymmetricSecurityKey>();
                keys.Add(signingKey);

                try
                {
                    ValidateAndDecode(authHeader, keys);
                    await _next.Invoke(context); 
                }
                catch (Exception ex)
                {
                    context.Response.StatusCode = 401;
                    await context.Response.WriteAsync(ex.Message);
                }
            } 
        }

intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

        const authReq = request.clone({
            headers: new HttpHeaders({
                //'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8'
                'Content-Type': 'application/json'
            })
          });
        
          console.log('Intercepted HTTP call', authReq);
        
          return next.handle(authReq);
       
    }

request is received when I send headers as

'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8'

but change it to

'Content-Type': 'application/json'

and service stops getting request from client

What I have tried:

intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

       const authReq = request.clone({
           headers: new HttpHeaders({
               //'Content-Type': 'application/x-www-form-urlencoded;charset=utf-8'
               'Content-Type': 'application/json'
           })
         });

         console.log('Intercepted HTTP call', authReq);

         return next.handle(authReq);

   }

Added headers but didn't work