Authenticator concept

A type T satisfies Authenticator concept if it satisifes the requirements listed below.

operation	type	arguments
a.async_auth(step, data, h)	`void`	`step` is `boost::mqtt5::auth_step_e` that specifies current authentication stage. `data` is `std::string`, server's authentication data. `h` is `boost::asio::any_completion_handler` with signature `void(boost::mqtt5::error_code ec, std::string client_data)`. If `ec` is non-trivial, authentication is aborted.
a.method()	`std::string_view`, authentication method

operation

type

arguments

a.async_auth(step, data, h)

void

step is boost::mqtt5::auth_step_e that specifies current authentication stage.

data is std::string, server's authentication data.

h is boost::asio::any_completion_handler with signature void(boost::mqtt5::error_code ec, std::string client_data). If ec is non-trivial, authentication is aborted.

a.method()

std::string_view, authentication method

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