diff --git a/packages/auth/src/middleware/passport/google.js b/packages/auth/src/middleware/passport/google.js
index 407772ebf0..96a0907536 100644
--- a/packages/auth/src/middleware/passport/google.js
+++ b/packages/auth/src/middleware/passport/google.js
@@ -2,20 +2,26 @@ const env = require("../../environment")
 const jwt = require("jsonwebtoken")
 const database = require("../../db")
 const GoogleStrategy = require("passport-google-oauth").OAuth2Strategy
-const { StaticDatabases, generateGlobalUserID } = require("../../db/utils")
+const {
+  StaticDatabases,
+  generateGlobalUserID,
+  ViewNames,
+} = require("../../db/utils")
 
 async function authenticate(token, tokenSecret, profile, done) {
   // Check the user exists in the instance DB by email
   const db = database.getDB(StaticDatabases.GLOBAL.name)
 
   let dbUser
+
   const userId = generateGlobalUserID(profile.id)
 
   try {
     // use the google profile id
     dbUser = await db.get(userId)
   } catch (err) {
-    console.error("Google user not found. Creating..")
+    console.log("Google user not found. Creating..")
+
     // create the user
     const user = {
       _id: userId,
@@ -26,6 +32,26 @@ async function authenticate(token, tokenSecret, profile, done) {
       },
       ...profile._json,
     }
+
+    // check if an account with the google email address exists locally
+    const users = await db.query(`database/${ViewNames.USER_BY_EMAIL}`, {
+      key: profile._json.email,
+      include_docs: true,
+    })
+
+    // Google user already exists by email
+    if (users.rows.length > 0) {
+      const existing = users.rows[0].doc
+
+      // remove the local account to avoid conflicts
+      await db.remove(existing._id, existing._rev)
+
+      // merge with existing account
+      user.roles = existing.roles
+      user.builder = existing.builder
+      user.admin = existing.admin
+    }
+
     const response = await db.post(user)
 
     dbUser = user
diff --git a/packages/server/src/api/controllers/datasource.js b/packages/server/src/api/controllers/datasource.js
index 4f3ebdb609..fa4bdf289b 100644
--- a/packages/server/src/api/controllers/datasource.js
+++ b/packages/server/src/api/controllers/datasource.js
@@ -4,6 +4,7 @@ const {
   getDatasourceParams,
   getQueryParams,
 } = require("../../db/utils")
+const { integrations } = require("../../integrations")
 
 exports.fetch = async function (ctx) {
   const database = new CouchDB(ctx.appId)
@@ -28,6 +29,12 @@ exports.save = async function (ctx) {
   const response = await db.post(datasource)
   datasource._rev = response.rev
 
+  // Drain connection pools when configuration is changed
+  const pool = integrations[datasource.source].pool
+  if (pool) {
+    await pool.end()
+  }
+
   ctx.status = 200
   ctx.message = "Datasource saved successfully."
   ctx.body = datasource
diff --git a/packages/server/src/integrations/microsoftSqlServer.js b/packages/server/src/integrations/microsoftSqlServer.js
index 05b92f1815..3dc5676e94 100644
--- a/packages/server/src/integrations/microsoftSqlServer.js
+++ b/packages/server/src/integrations/microsoftSqlServer.js
@@ -1,8 +1,6 @@
 const sqlServer = require("mssql")
 const { FIELD_TYPES } = require("./Integration")
 
-let pool
-
 const SCHEMA = {
   docs: "https://github.com/tediousjs/node-mssql",
   description:
@@ -53,19 +51,21 @@ const SCHEMA = {
 }
 
 class SqlServerIntegration {
+  static pool
+
   constructor(config) {
     this.config = config
     this.config.options = {
       encrypt: this.config.encrypt,
     }
     delete this.config.encrypt
-    if (!pool) {
-      pool = new sqlServer.ConnectionPool(this.config)
+    if (!this.pool) {
+      this.pool = new sqlServer.ConnectionPool(this.config)
     }
   }
 
   async connect() {
-    const client = await pool.connect()
+    const client = await this.pool.connect()
     this.client = client.request()
   }
 
diff --git a/packages/server/src/integrations/postgres.js b/packages/server/src/integrations/postgres.js
index ed49e42f1c..ebc39a31a4 100644
--- a/packages/server/src/integrations/postgres.js
+++ b/packages/server/src/integrations/postgres.js
@@ -1,8 +1,6 @@
 const { Pool } = require("pg")
 const { FIELD_TYPES } = require("./Integration")
 
-let pool
-
 const SCHEMA = {
   docs: "https://node-postgres.com",
   friendlyName: "PostgreSQL",
@@ -35,7 +33,8 @@ const SCHEMA = {
       required: true,
     },
     ssl: {
-      type: FIELD_TYPES.OBJECT,
+      type: FIELD_TYPES.BOOLEAN,
+      default: false,
       required: false,
     },
   },
@@ -56,28 +55,28 @@ const SCHEMA = {
 }
 
 class PostgresIntegration {
+  static pool
+
   constructor(config) {
     this.config = config
-    if (this.config.ssl && this.config.ssl.rejectUnauthorized) {
-      this.config.ssl.rejectUnauthorized =
-        this.config.ssl.rejectUnauthorized === "true"
+    if (this.config.ssl) {
+      this.config.ssl = {
+        rejectUnauthorized: true,
+      }
     }
 
-    if (!pool) {
-      pool = new Pool(this.config)
+    if (!this.pool) {
+      this.pool = new Pool(this.config)
     }
+
+    this.client = this.pool
   }
 
   async query(sql) {
     try {
-      this.client = await pool.connect()
       return await this.client.query(sql)
     } catch (err) {
       throw new Error(err)
-    } finally {
-      if (this.client) {
-        this.client.release()
-      }
     }
   }