let http = Http(baseURL: "http://server.com")

http.request(.get, path: "/get", completionHandler: {(response, error) in
     // handle response
})

http.request(.post, path: "/post",  parameters: ["key": "value"], 
                    completionHandler: {(response, error) in
     // handle response
})
...

let credential = URLCredential(user: "john", 
                                 password: "pass", 
                                 persistence: .none)

http.request(.get, path: "/protected/endpoint", credential: credential, 
                                completionHandler: {(response, error) in
   // handle response
})

// create a protection space
let protectionSpace = URLProtectionSpace(host: "httpbin.org",
                        port: 443,
                        protocol: NSURLProtectionSpaceHTTP,
                        realm: "[email protected]",
                        authenticationMethod: NSURLAuthenticationMethodHTTPDigest)

// setup credential
// notice that we use '.ForSession' type otherwise credential storage will discard and
// won't save it when doing 'credentialStorage.setDefaultCredential' later on
let credential = URLCredential(user: "user",
                        password: "password",
                        persistence: .forSession)
// assign it to credential storage
let credentialStorage = URLCredentialStorage.shared
credentialStorage.setDefaultCredential(credential, for: protectionSpace);

// set up default configuration and assign credential storage
let configuration = URLSessionConfiguration.default
configuration.urlCredentialStorage = credentialStorage

// assign custom configuration to Http
let http = Http(baseURL: "http://httpbin.org", sessionConfig: configuration)
http.request(.get, path: "/protected/endpoint", completionHandler: {(response, error) in
    // handle response
})