Create interface for Publlisher rest api services

+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>io.entgra.devicemgt.apimgt.extension.rest.api</artifactId>
+    <packaging>bundle</packaging>
+    <name>Entgra - Device API Management Extension Publisher API</name>

+<!--            </plugin>-->
+        </plugins>
+    </build>
+    <properties>

+        jsonObject.put("saasApp", true);
+
+        RequestBody requestBody = RequestBody.Companion.create(jsonObject.toString(), JSON);
+        String applicationEndpoint = "https://localhost:9443/client-registration/v0.17/register";

+            throws APIApplicationServicesException {
+
+        RequestBody requestBody = RequestBody.Companion.create(nameValuePairs.toString(), JSON);
+        String tokenEndPoint = "https://localhost:9443/oauth2/token";

+    public JSONObject getScopes(APIApplicationKey apiApplicationKey, AccessTokenInfo accessTokenInfo)
+            throws APIApplicationServicesException, BadRequestException {
+
+        String getScopesUrl = "https://localhost:9443/api/am/publisher/v2/scopes?limit=1000";

+
+        try {
+            Response response = client.newCall(request).execute();
+            if (response.code() == HttpStatus.SC_OK) {

+                //TODO: max attempt count
+                return updateSharedScope(apiApplicationKey, refreshedAccessToken, scope);
+            } else if (HttpStatus.SC_BAD_REQUEST == response.code()) {
+                log.info(response);

+            }
+        } catch (IOException e) {
+            String msg = "Error occurred while processing the response";
+            throw new APIApplicationServicesException(msg);

+package io.entgra.devicemgt.apimgt.extension.rest.api.constants;

  */
 package org.wso2.carbon.apimgt.webapp.publisher;
 
-

-            throw new APIManagerPublisherException(e);
+        }
+        catch (APIApplicationServicesException e) {
+            log.error(e);

                 <version>${carbon.device.mgt.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.wso2.carbon.devicemgt</groupId>

+            SSLContext sc = SSLContext.getInstance("SSL");
+            sc.init(null, trustAllCerts, new java.security.SecureRandom());
+            return sc.getSocketFactory();
+        } catch (KeyManagementException | NoSuchAlgorithmException e) {

+    public JSONObject getScopes(APIApplicationKey apiApplicationKey, AccessTokenInfo accessTokenInfo)
+            throws APIServicesException, BadRequestException {
+
+        String getAllScopesUrl = "https://" + host + ":" + port + Constants.GET_ALL_SCOPES;

+            throws APIServicesException, BadRequestException {
+
+        String keyValue = new String(Base64.encodeBase64((key).getBytes())).replace("=", "");
+        String getScopeUrl = "https://" + host + ":" + port + Constants.GET_SCOPE + keyValue;

+    public boolean updateSharedScope(APIApplicationKey apiApplicationKey, AccessTokenInfo accessTokenInfo, Scope scope)
+            throws APIServicesException, BadRequestException {
+
+        String updateScopeUrl = "https://" + host + ":" + port + Constants.GET_SCOPE + scope.getId();

+                            JSONArray scopeList = (JSONArray) scopeObject.get("list");
+                            for (int i = 0; i < scopeList.length(); i++) {
+                                JSONObject scopeObj = null;
+                                scopeObj = scopeList.getJSONObject(i);

+    }
+
+    protected static OkHttpClient getOkHttpClient() {
+        X509TrustManager trustAllCerts = new X509TrustManager() {

+
+    private static SSLSocketFactory getSimpleTrustedSSLSocketFactory() {
+        try {
+            TrustManager[] trustAllCerts = new TrustManager[]{

+                log.error(msg);
+                throw new BadRequestException(msg);
+            } else {
+                return null;

+                log.error(msg);
+                throw new BadRequestException(msg);
+            } else {
+                return false;

+                log.error(msg);
+                throw new BadRequestException(msg);
+            } else {
+                return false;