chore(): Reorganize modules (#7210)

**What**
Move all modules to the modules directory

packages/modules/auth/src/providers/email-password.ts

@@ -0,0 +1,106 @@
+import { AuthenticationInput, AuthenticationResponse } from "@medusajs/types"
+import {
+  AbstractAuthModuleProvider,
+  MedusaError,
+  isString,
+} from "@medusajs/utils"
+
+import { AuthUserService } from "@services"
+import Scrypt from "scrypt-kdf"
+
+class EmailPasswordProvider extends AbstractAuthModuleProvider {
+  public static PROVIDER = "emailpass"
+  public static DISPLAY_NAME = "Email/Password Authentication"
+
+  protected readonly authUserSerivce_: AuthUserService
+
+  constructor({ authUserService }: { authUserService: AuthUserService }) {
+    super(arguments[0], {
+      provider: EmailPasswordProvider.PROVIDER,
+      displayName: EmailPasswordProvider.DISPLAY_NAME,
+    })
+
+    this.authUserSerivce_ = authUserService
+  }
+
+  private getHashConfig() {
+    const scopeConfig = this.scopeConfig_.hashConfig as
+      | Scrypt.ScryptParams
+      | undefined
+
+    const defaultHashConfig = { logN: 15, r: 8, p: 1 }
+
+    // Return custom defined hash config or default hash parameters
+    return scopeConfig ?? defaultHashConfig
+  }
+
+  async authenticate(
+    userData: AuthenticationInput
+  ): Promise<AuthenticationResponse> {
+    const { email, password } = userData.body
+
+    if (!password || !isString(password)) {
+      return {
+        success: false,
+        error: "Password should be a string",
+      }
+    }
+
+    if (!email || !isString(email)) {
+      return {
+        success: false,
+        error: "Email should be a string",
+      }
+    }
+    let authUser
+
+    try {
+      authUser = await this.authUserSerivce_.retrieveByProviderAndEntityId(
+        email,
+        EmailPasswordProvider.PROVIDER
+      )
+    } catch (error) {
+      if (error.type === MedusaError.Types.NOT_FOUND) {
+        const password_hash = await Scrypt.kdf(password, this.getHashConfig())
+
+        const [createdAuthUser] = await this.authUserSerivce_.create([
+          {
+            entity_id: email,
+            provider: EmailPasswordProvider.PROVIDER,
+            scope: this.scope_,
+            provider_metadata: {
+              password: password_hash.toString("base64"),
+            },
+          },
+        ])
+
+        return {
+          success: true,
+          authUser: JSON.parse(JSON.stringify(createdAuthUser)),
+        }
+      }
+      return { success: false, error: error.message }
+    }
+
+    const password_hash = authUser.provider_metadata?.password
+
+    if (isString(password_hash)) {
+      const buf = Buffer.from(password_hash as string, "base64")
+
+      const success = await Scrypt.verify(buf, password)
+
+      if (success) {
+        delete authUser.provider_metadata!.password
+
+        return { success, authUser: JSON.parse(JSON.stringify(authUser)) }
+      }
+    }
+
+    return {
+      success: false,
+      error: "Invalid email or password",
+    }
+  }
+}
+
+export default EmailPasswordProvider