exposing rt grant flow as public api (#48)

* exposing rt grant flow as public api

Author: SomkaPe

src/main/java/com/microsoft/aad/msal4j/ClientApplicationBase.java

@@ -103,17 +103,8 @@ public CompletableFuture<IAuthenticationResult> acquireToken(AuthorizationCodePa
         return this.executeRequest(authorizationCodeRequest);
     }
 
-    /**
-     * Acquires a security token from the authority using a Refresh Token
-     * previously received.
-     *
-     * @param parameters#refreshToken Refresh Token to use in the refresh flow.
-     * @param parameters#scopes       scopes of the access request
-     * @return A {@link CompletableFuture} object representing the
-     * {@link IAuthenticationResult} of the call. It contains Access
-     * Token, Refresh Token and the Access Token's expiration time.
-     */
-    CompletableFuture<IAuthenticationResult> acquireToken(RefreshTokenParameters parameters) {
+    @Override
+    public CompletableFuture<IAuthenticationResult> acquireToken(RefreshTokenParameters parameters) {
 
         validateNotNull("parameters", parameters);
 

src/main/java/com/microsoft/aad/msal4j/IClientApplicationBase.java

@@ -92,6 +92,18 @@ public interface IClientApplicationBase {
      */
     CompletableFuture<IAuthenticationResult> acquireToken(AuthorizationCodeParameters parameters);
 
+    /**
+     * Acquires a security token from the authority using a Refresh Token previously received.
+     * Can be used in migration to MSAL from ADAL v2, and in various integration
+     * scenarios where you have a RefreshToken available.
+     * See https://aka.ms/msal-net-migration-adal2-msal2.
+     *
+     * @param parameters#refreshToken Refresh Token to use in the refresh flow.
+     * @param parameters#scopes       scopes of the access request
+     * @return A {@link CompletableFuture} object representing the {@link IAuthenticationResult} of the call.
+     */
+    CompletableFuture<IAuthenticationResult> acquireToken(RefreshTokenParameters parameters);
+
     /**
      * Returning tokens from cache or requesting new one using previously cached refresh tokens
      *