feat: fixing snap connect issues (#4560)

## Explanation

Profile sync SDK was not exporting any method for connecting to snap.
This PR exports a method to connect to snap after initializing the SDK

packages/profile-sync-controller/src/sdk/authentication.ts

@@ -8,6 +8,8 @@ import type { UserProfile, Pair } from './authentication-jwt-bearer/types';
 import { AuthType } from './authentication-jwt-bearer/types';
 import type { Env } from './env';
 import { PairError, UnsupportedAuthTypeError } from './errors';
+import { getMetaMaskProviderEIP6963 } from './utils/eip-6963-metamask-provider';
+import { connectSnap } from './utils/messaging-signing-snap-requests';
 
 // Computing the Classes, so we only get back the public methods for the interface.
 // TODO: Either fix this lint violation or explain why it's necessary to ignore.
@@ -48,6 +50,15 @@ export class JwtBearerAuth implements SIWEInterface, SRPInterface {
     return await this.#sdk.getAccessToken();
   }
 
+  async connectSnap(): Promise<string> {
+    const provider = await getMetaMaskProviderEIP6963();
+    if (!provider) {
+      throw new Error('failed to get MetaMaskProviderEIP6963 provider');
+    }
+    const res = await connectSnap(provider);
+    return res;
+  }
+
   async getUserProfile(): Promise<UserProfile> {
     return await this.#sdk.getUserProfile();
   }