js: Clean up some oddness in old code as I struggle to replace it.

core/core.js

@@ -648,16 +648,24 @@ async function getProcessBlob(blobId, key, options) {
 					permissions: await imports.core.permissionsGranted(),
 				});
 			};
-			process.resetPermission = async function resetPermission(permission) {
-				let user = process?.credentials?.session?.name;
-				await ssb.setUserPermission(
-					user,
-					options?.packageOwner,
-					options?.packageName,
-					permission,
-					undefined
-				);
-				return process.sendPermissions();
+			process.client_api = {
+				createIdentity: function() {
+					return process.createIdentity();
+				},
+				resetPermission: async function resetPermission(message) {
+					let user = process?.credentials?.session?.name;
+					await ssb.setUserPermission(
+						user,
+						options?.packageOwner,
+						options?.packageName,
+						message.permission,
+						undefined
+					);
+					return process.sendPermissions();
+				},
+				setActiveIdentity: function setActiveIdentity(message) {
+					return process.setActiveIdentity(message.identity);
+				},
 			};
 			ssb.registerImports(imports, process);
 			process.task.setImports(imports);