fix many, many more type errors

src/views/IdentitySwitcherView.vue

@@ -85,12 +85,12 @@ export default class IdentitySwitcherView extends Vue {
 
   Constants = AppString;
   public accounts: AccountsSchema;
-  public activeDid;
-  public firstName;
-  public lastName;
+  public activeDid = "";
+  public firstName = "";
+  public lastName = "";
   public otherIdentities = [];
 
-  public async getIdentity(activeDid) {
+  public async getIdentity(activeDid: string) {
     await accountsDB.open();
     const account = await accountsDB.accounts
       .where("did")
@@ -128,7 +128,7 @@ export default class IdentitySwitcherView extends Vue {
       }
     } catch (err) {
       if (
-        err.message ===
+        err?.message ===
         "Attempted to load account records with no identity available."
       ) {
         this.limitsMessage = "No identity.";
@@ -151,7 +151,7 @@ export default class IdentitySwitcherView extends Vue {
     }
   }
 
-  async switchAccount(did: string) {
+  async switchAccount(did?: string) {
     // 0 means none
     if (did === "0") {
       did = undefined;