update readme

README.md

-# Emepclient
+# Client for getNncIdentity service of KED
 
-Client to connect EMEP service, useful for use with nextjs/nodejs projects.
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+Client to connect EMEP service, useful for use with nextjs/nodejs projects.
+
+#### Example:
+```
+import getIdentity from '@digigov-oss/get-nnc-identity-client';
+
+const test = async () => {
+   const overides = {
+        prod:false,
+        auditInit: {
+            auditUnit: 'grnet.gr',
+        },
+        auditStoragePath: '/auditStorage',
+    }
+
+    try {
+        const Identity = await getIdentity("052704062", "username", "password",overides);
+         return Identity;
+        } catch (error) {
+        console.log(error);
+        }
+}
+
+test().then((identity) => { console.log('getNncIdentityOutputRecord',identity); });
+```
+* you can use `overides` to override the default values
+* for test you dont need to use the `overides`, in that case default storage path will be used `/tmp`
+* look at [KED](https://www.gsis.gr/dimosia-dioikisi/ked/) common guides for records you can use on auditInit"
+
+
+#### Returns
+an object like the following:
+```
+{
+  countryCode: 'GRC',
+  countryDescr: 'Ελλάδα',
+  addressStreet: 'Βενιζέλου Ελευθερίου',
+  addressNumber: '86',
+  addressCity: 'Αθήνα',
+  telephone: '2101234567',
+  countryCode2: 'GRC',
+  countryDescr2: 'Ελλάδα',
+  addressStreet2: 'Ιάσονος',
+  addressNumber2: '14',
+  addressCity2: 'Αθήνα',
+  mobile: '6979114217',
+  email: 'andreas-hal@hotmail.com',
+  epikForeisFlag: '1',
+  epidForeisFlag: '1'  
+}
+```
+or an error message like:
+```
+{ message: 'Ο Α.Φ.Μ. δεν είναι καταχωρημένος' }
+```
+
+#### Available AFM for testing:
+019285930,  052704062,  076509078 
+
+##### * Notes
+you have to ask KED for notificationCenter_v_0.95 documentation to get more info about the output and error fields.
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