OpenAPI 3.0 with Bearer authentication using Swashbuckle

program.cs

//First we define the security scheme
c.AddSecurityDefinition("Bearer", //Name the security scheme
    new OpenApiSecurityScheme{
    Description = "JWT Authorization header using the Bearer scheme.",
    Type = SecuritySchemeType.Http, //We set the scheme type to http since we're using bearer authentication
    Scheme = "bearer" //The name of the HTTP Authorization scheme to be used in the Authorization header. In this case "bearer".
});

c.AddSecurityRequirement(new OpenApiSecurityRequirement{ 
    {
        new OpenApiSecurityScheme{
            Reference = new OpenApiReference{
                Id = "Bearer", //The name of the previously defined security scheme.
                Type = ReferenceType.SecurityScheme
            }
        },new List<string>()
    }
});

// RFC 7235: https://www.rfc-editor.org/rfc/rfc7235#section-5.1
// Ref: https://stackoverflow.com/a/57872872/23266117