add identity_credential.md

src/content/1.credentials/identity_credential.md

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+# identity_credential
+
+```json
+{
+    "@context": ["https://www.w3.org/2018/credentials/v1"],
+    "type": ["VerifiableCredential", "IdentityCredential"],
+    "id": "",
+    "credentialSubject": {
+      "given_name": "John",
+      "family_name": "Doe",
+      "email": "[email protected]",
+      "phone_number": "+1-202-555-0101",
+      "address": {
+        "street_address": "123 Main St",
+        "locality": "Anytown",
+        "region": "Anystate",
+        "country": "US"
+      },
+      "birthdate": "1940-01-01",
+      "is_over_18": true,
+      "is_over_21": true,
+      "is_over_65": true
+    },
+    "issuer": {
+        "id": "did:key:z6MkrHKzgsahxBLyNAbLQyB1pcWNYC9GmywiWPgkrvntAZcj",
+        "name": "Government of Anytown"
+    },
+    "issuanceDate": "2021-08-31T00:00:00Z",
+    "validFrom": "2021-09-01T00:00:00Z",
+    "expirationDate": "2031-08-31T00:00:00Z"
+}
+```
+
+## Manifest
+
+```json
+{
+    "claims": {
+      "Name": "$.credentialSubject.given_name",
+      "Family Name": "$.credentialSubject.family_name",
+      "Email": "$.credentialSubject.email",
+      "Phone number": "$.credentialSubject.phone_number",
+      "Address": "$.credentialSubject.address",
+      "Date of Birth": "$.credentialSubject.birthdate",
+      "Over 18": "$.credentialSubject.is_over_18",
+      "Over 21": "$.credentialSubject.is_over_21",
+      "Over 65": "$.credentialSubject.is_over_65"
+    }
+}
+```
+
+## Mapping example
+
+```json
+{
+    "id": "<uuid>",
+    "issuer": {
+        "id": "<issuerDid>"
+    },
+    "credentialSubject": {
+        "id": "<subjectDid>"
+    },
+    "issuanceDate": "<timestamp>",
+    "validFrom": "<timestamp>",
+    "expirationDate": "<timestamp-in:365d>"
+}
+```