feat(job-pid): added print PID of the executed job

src/SessionManager.ts

@@ -1,5 +1,6 @@
-import { Session, Context, CsrfToken } from './types'
+import { Session, Context, CsrfToken, SessionVariable } from './types'
 import { asyncForEach, makeRequest, isUrl } from './utils'
+import { prefixMessage } from '@sasjs/utils/error'
 
 const MAX_SESSION_COUNT = 1
 const RETRY_LIMIT: number = 3
@@ -265,4 +266,21 @@ export class SessionManager {
       throw err
     })
   }
+
+  async getVariable(sessionId: string, variable: string, accessToken?: string) {
+    const getSessionVariable = {
+      method: 'GET',
+      headers: this.getHeaders(accessToken)
+    }
+
+    return await this.request<SessionVariable>(
+      `${this.serverUrl}/compute/sessions/${sessionId}/variables/${variable}`,
+      getSessionVariable
+    ).catch((err) => {
+      throw prefixMessage(
+        err,
+        `Error while fetching session variable '${variable}'.`
+      )
+    })
+  }
 }