allow choice of no identity (for testing)

src/views/AccountViewView.vue

@@ -290,6 +290,11 @@
 
     <div v-if="numAccounts > 0" class="flex py-2">
       Switch Identifier
+      <span>
+        <button class="text-blue-500 px-2" @click="switchAccount(0)">
+          None
+        </button>
+      </span>
       <span v-for="accountNum in numAccounts" :key="accountNum">
         <button class="text-blue-500 px-2" @click="switchAccount(accountNum)">
           #{{ accountNum }}
@@ -403,7 +408,9 @@ export default class AccountViewView extends Vue {
       const account = R.find((acc) => acc.did === this.activeDid, accounts);
       const identity = JSON.parse(account?.identity || "null");
       if (!identity) {
-        throw new Error("No identity found.");
+        this.limitsMessage = "No identity.";
+        this.loadingLimits = false;
+        return;
       }
       this.publicHex = identity.keys[0].publicKeyHex;
       this.publicBase64 = Buffer.from(this.publicHex, "hex").toString("base64");
@@ -469,7 +476,9 @@ export default class AccountViewView extends Vue {
     const account = R.find((acc) => acc.did === this.activeDid, accounts);
     const identity = JSON.parse(account?.identity || "null");
     if (!identity) {
-      throw new Error("No identity found.");
+      this.limitsMessage = "No identity.";
+      this.loadingLimits = false;
+      return;
     }
     const token = await accessToken(identity);
     const headers = {
@@ -497,19 +506,31 @@ export default class AccountViewView extends Vue {
   }
 
   async switchAccount(accountNum: number) {
-    await accountsDB.open();
-    const accounts = await accountsDB.accounts.toArray();
-    const account = accounts[accountNum - 1];
+    // 0 means none
+    if (accountNum === 0) {
+      await db.open();
+      db.settings.update(MASTER_SETTINGS_KEY, {
+        activeDid: undefined,
+      });
+      this.activeDid = "";
+      this.derivationPath = "";
+      this.publicHex = "";
+      this.publicBase64 = "";
+    } else {
+      await accountsDB.open();
+      const accounts = await accountsDB.accounts.toArray();
+      const account = accounts[accountNum - 1];
 
-    await db.open();
-    db.settings.update(MASTER_SETTINGS_KEY, {
-      activeDid: account.did,
-    });
+      await db.open();
+      db.settings.update(MASTER_SETTINGS_KEY, {
+        activeDid: account.did,
+      });
 
-    this.activeDid = account.did;
-    this.derivationPath = account.derivationPath;
-    this.publicHex = account.publicKeyHex;
-    this.publicBase64 = Buffer.from(this.publicHex, "hex").toString("base64");
+      this.activeDid = account.did;
+      this.derivationPath = account.derivationPath;
+      this.publicHex = account.publicKeyHex;
+      this.publicBase64 = Buffer.from(this.publicHex, "hex").toString("base64");
+    }
   }
 
   public showContactGivesClassNames() {