   - parameter session: A valid `SSH2Session` that will be used to retrieve the banner.
   If `nil` a previously open internal session will be used or an error will be returned.
   
-  - throws: `UnableToProceedWithoutValidSSH2Session`: When no valid `SSH2Session` was passed or found internally.
-  - throws: `AuthenticationFailed`: When no valid `username` was passed or found internally.
-  - throws: `RetrieveDataOperationError`: When unabled to check authentication methods for the host and username combination.
+  - throws `UnableToProceedWithoutValidSSH2Session`: When no valid `SSH2Session` was passed or found internally.
+  - throws `AuthenticationFailed`: When no valid `username` was passed or found internally.
+  - throws `RetrieveDataOperationError`: When unabled to check authentication methods for the host and username combination.
   */
   public func supportsAuthenticationMethod(method: String, session sess: SSH2Session?=nil, username usr: String?=nil) throws -> Bool {
     /**

  - returns: A `Result` with a tuple of (SSH2Session, Fingerprint) for the current 
  host if succeeds or `String` describing the current error.

  - throws: `UnableToCreateUnderlyingLibSSH2Session`: When `libssh2_session_init` fails.
  - throws: `AuthenticationFailed`: When the `handshake` with the host fails.
  - throws: `HostError`: 
    + When unable to establish a socket with the host.
    + When unable to discover address information for the server provided.
  */

  
  - returns: A list of `String` name for the supported authentication methods for the provided `username`.
  
  - throws `UnableToProceedWithoutValidSSH2Session`: When no valid `SSH2Session` was passed or found internally.
  - throws `AuthenticationFailed`: When no valid `username` was passed or found internally.
  - throws `RetrieveDataOperationError`: When unabled to check authentication methods for the host and username combination.
  */
  public func supportedAuthenticationMethodsForUsername(username usr:String?=nil, session sess: SSH2Session?=nil) throws -> [String] {
    /**
