JWT Validation using ASP.NET Core build in stuff

TokenValidationParamsSettings.cs

//From <https://stormpath.com/blog/token-authentication-asp-net-core>

var tokenValidationParameters = new TokenValidationParameters
{
  // The signing key must match!
  ValidateIssuerSigningKey = true,
  IssuerSigningKey = signingKey,

  // Validate the JWT Issuer (iss) claim
  ValidateIssuer = true,
  ValidIssuer = "ExampleIssuer",

  // Validate the JWT Audience (aud) claim
  ValidateAudience = true,
  ValidAudience = "ExampleAudience",

  // Validate the token expiry
  ValidateLifetime = true,

  // If you want to allow a certain amount of clock drift, set that here:
  ClockSkew = TimeSpan.Zero
};

app.UseJwtBearerAuthentication(new JwtBearerOptions
{
  AutomaticAuthenticate = true,
  AutomaticChallenge = true,
  TokenValidationParameters = tokenValidationParameters
});